1.

If (n-m) is odd and |m|ne|n| then int_(0)^(pi)cosmxsinnxdx=..........

Answer»

`(2N)/(n^(2)-m^(2))`
0
`(2n)/(m^(2)-n^(2))`
`(2m)/(n^(2)-m^(2))`

ANSWER :A


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